Cambridge IGCSE · 0620 · Paper 4 · Theory (Extended)
Chemistry 0620/42 Feb/March 2022 past paper
Cambridge IGCSE Chemistry (0620) Paper 4 (Theory (Extended)), variant 2, Feb/March 2022: the question paper and its official mark scheme, 6 questions worth 80 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 6
- Marks
- 80
- Grade A from
- 45
File names: 0620_m22_qp_42 · 0620_m22_ms_42
Grade thresholds for 0620/42 Feb/March 2022
The minimum raw marks Cambridge set for each grade on this component (out of 80). Thresholds change every session and variant, so always compare your score with the paper you actually sat.
| A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|
| 45 | 36 | 25 | 20 | 14 | 9 | 4 |
Topics in this paper
Which syllabus chapters 0620/42 Feb/March 2022 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Chemistry of the environment | 2 | 29 |
| Stoichiometry | 1 | 17 |
| Electrochemistry | 1 | 13 |
| Organic chemistry | 1 | 11 |
| Metals | 1 | 10 |
Questions in 0620/42 Feb/March 2022
- Question 1
This question is about the first 30 elements in the Periodic Table. Name the element which: (a) is 78% of clean, dry air �������������������������������������������������������������������������������������������������������� (b) has atoms with an electronic structure of …
- Question 2
A student adds excess large pieces of magnesium carbonate, MgCO3, to dilute hydrochloric acid, HCl, and measures the volume of carbon dioxide gas, CO2, given off. (a) Add the missing state symbols to the chemical equation for the reaction. MgCO3 …
- Question 3
Nitrogen dioxide, NO2, is an atmospheric pollutant and is formed in car engines. (a) Explain how nitrogen dioxide is formed in car engines. (b) Nitrogen dioxide causes respiratory problems. State one other adverse effect of nitrogen dioxide. (c) Nitrogen dioxide …
- Question 4
This question is about chemical reactions and electricity. (a) The diagram shows the apparatus used in the production of electrical energy in a simple cell. V voltmeter iron electrode zinc electrode electrolyte The zinc electrode dissolves in the electrolyte forming …
- Question 5
This question is about alkanes and alkenes. (a) Short-chain alkanes and alkenes can be formed from long-chain alkanes in a chemical reaction. (i) Name the type of chemical reaction which forms short‑chain alkanes and alkenes from long‑chain alkanes. (ii) Decane …
- Question 6
The names of four esters are listed. methyl propanoate ethyl propanoate propyl propanoate butyl propanoate (a) Esters are a family of organic compounds with similar chemical properties. They can be represented by the formula CnH2nO2. (i) State the name given …
Other Chemistry papers from Feb/March 2022
- 0620/12 Multiple choice (Core)
- 0620/22 Multiple choice (Extended)
- 0620/32 Theory (Core)
- 0620/62 Alternative to Practical